Mechanism for operating dampers.



No. 698,808. Patented Apr. 29, I902.

E. .B. CAHDDNE. MECHANISM FOR OPERATING DAMPERS.

(Application filed Jan. 13, 1902.)

{No Model.)

UNITED STATES PATENT OFFICE.

EDI/VIN R. OAHOONE,-OF TROY, ,NEW YORK MECHANISM FOR OPERATING DAMPERS.

SPECIFICATION forming part of Letters Patent No. 698,808, dated April29, 19022 Original application filed March 5, 1901; Serial No. 49,819.Divided and this application filed January 13, 1902. Serial No. 89,559.(No model.)

T0 (tZZ whom, it may concern:

Be it known that LEDWIN R. CAHOONE, a citizen of the United States,residing at Troy, in the county of Rensselaer and State of New York,have invented certain new and useful Improvements in Mechanism forOperating Dampers; and I do declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, and to the figures ofreference marked thereon, which form a part of this specification. 7

This invention relates to improvements in dampers for downdraft-stovesand the means employed for operating the same and is a division of myapplication, Serial No. 49,819, filed March 5, 1901.

In downdraft-stoves considerable difficulty has been experienced inpreventing the gases which lag above the fuel escaping into the roomwhen the feed-door is openedthat is to say, when the door is opened itcreates It is therefore the object of my present invention to obviatethis objectionable feature by providing a damper in the upper part ofthe fire-pot at a point approximately in line with the smoke-exit flueand connect this.

damper with the feed-door in such manner that when the latter is raisedthe damper will be simultaneously opened, permitting the ac-.

cumulated gases above the fuel to be drawn out of the stove through theexit-flue under the influence of the draft.

Many other advantages will be hereinafter referred to and beparticularly pointed out in the claims.

In the drawings forming a part of this specification, Figurelisavertical section of a conventional downdraft-stove, showing theapplication of my invention. Fig. 2 is a top plan view of a stove, theornamental swinging cover being broken away. Fig. 3 is a detail sectionof the upper portion of the stove approximately on the line A A of Fig.2.

The numeral 1 indicates a downdraft-stove additional fastening means forpositioning the damper.

In the stove-top 5 is the usual feed-opening 11 and feed-door 12, thelatter being hinged at 13 to permit of its being swung upwardly.

A chain or analogous device 14 connects the.

door 12 with the damper 7, so that in operation one is dependent on theother. As a rule heatin g-stoves are provided with a horizon talswinging ornamental cap 15, pivoted at 16, so that in order to obtainaccess to' the feeddoor 12 the cap 15 must be swung on its pivot. It isthis movement I utilize to open the damper 7 and accomplish suchmovement by providing an upwardly-extending lug 17 on the door 12, saidlug projecting up into the plane of the bottom of the swinging cap 15and is designed to be struck thereby.

The parts thus assembled, the operation is substantially as follows:Should it be desired to open the feed-door 12, the operator swings the mlt aro'und'inthe direction of the arrow, Fig. 2, whereupon the loweredge of said cap impinges thelug 17, which swings the door 12 upwardly,and by the chain connection with the damper 7 the latter issimultaneously swung upwardly, uncovering the opening 6, which connectsthe direct draft with the fire-pot.

I am also aware it is old in the art to operatea feed-door by swingingthe stove-cap; but to combine this feature with a liftingdamper isunique and has many advantages in a downdraft-stove. A stove equippedwith a' damper operated as described is, indeed, novel and useful, theforemost of which is that of preventing the admission of cool air to thefire-pot. Heretofore when introducing fuel to the fire-pot the rushingin of the cool air materially decreases the grade of combustion, so muchso that a very large volume of gas would be produced and sucked out intothe room. Not so when the incoming air is drawn away from theincandescent gas into the exit-flue, for when the door 12 is opened thedamper '7 is also opened, and instead of the lagging gases rushing intothe room such gases, together with the air coming in through the feedopening, are immediately pulled through the opening-6, where they aremixed with the escaping gases in the space 3 and carried off through thesmoke-exit 4.

From the foregoingdescription it is thought the operation and advantagesof my invention will be readily understood by those skilled in the artto which it appertains.

Having thus fully described my invention, what I claim as new is 1. In adowndraft-stove, the combination with a casing, a fire-pot having anopening at or near its upper end, a gravity-damper normally coveringsaid opening, an exit-space beingformed between the fire-pot and casing,an exit-flue, a feed-door and a connection between said door and thedamper,wherebythe damperis uncovered when the feed-door is raised, andcommunication formed direct with the exit-flue and thefire-pot, saiddamper closing by gravity when the feed-door is closed, substantially asdescribed.

2. A device for the purpose described,comprising a damper adapted to beswung upwardly, a hinged door, and means connecting the door and damperwhereby said damper is opened when the door is opened, and closes bygravity, when the door is closed, substantially as described.

3. In a stove, the combination with a casing, a cover, a damper havinglugs, bearings which are open adjacent the cover, said lugs beingconfined by the cover, a feed-door, and means connecting the feed-doorand damper,

whereby the two are simultaneously operated.

4. In a downdraft-stove, the combination with a casing, a top, afeed-door in said top,

a fire-pot having an opening at or near its upper end, a damper normallycovering said opening, means connecting the damper and feed-door, and aswinging cap, said cap contacting with the feed-door to open the damper,substantially as described.

5. A horizontal swinging member, a door operating at an angle thereto,in combination with a damper, and a connection between the damper andsaid door whereby the damper is operated when the horizontal swingingmember is operated, substantially as described.

6. A horizontal swinging member, a door operating at an angle thereto,in combination with a hinged damper, and a chain connect ing the damperand said door, whereby the damper is elevated when the horizontalswinging member is operated, substantially as do scribed.

'7. In a downdraft-stove, the combination with a casing, a fire-pothaving an opening at or near the top, bearings which are open at thetop, a damper provided with lugs which are seated in said bearings, atop, said top confining the lugs of the damperin the bearings, a door inthe top, and a connection between the door and damper, whereby thedamper and door are simultaneously operated, substantially as described.

8. In a downdraft-stove, the combination with a casing, a fire-pothaving an opening, a dam percovering' said opening, an exit-space beingformed between the fire-pot and easing, an exit-flue communicating with.said exitspace, a feed-door, and a connection between said door and thedamper, said connection being a chain, whereby the damper uncovers theopening in the fire-pot when the feed-door is opened, and may be seatedindependent of the feed-door, substantially as described.

In testimony whereof I atiix my signature in presence of two witnesses.

EDXVIN R. CAI-IOONE.

\Vitnesses:

T. H. PEEL, JAMES A. ODONNELL.

